I play with nameplates on, and I've never seen anything like that. Are you sure it happens when all addons are disabled at the character screen? Both of your screenshots appear to have at least one addon modifying the nameplates.

I play with nameplates on, and I've never seen anything like that. Are you sure it happens when all addons are disabled at the character screen? Both of your screenshots appear to have at least one addon modifying the nameplates.

If you want to see it:
go to any training dummys
logout so you can't see the nameplates
login and fly to the nameplates

Added screenshot without any mod:

I found the files its inside the TARGETINGFRAME folder UI-TARGETINGFRAME-FLASH.blp

Yeah. I like that tagged color aswell. But it is pretty close to warlock color. I really hope that it does not match warlock color. Otherwise any tagged mob would be a warlock. (Maybe that is intended because Warlocks are evil)

Btw there is another bug. On an active nameplate (alpha = 1 on the nameplate object) it is possible to have the healthbar object with alpha 0.5. This results in the healthbar being much less visible as intended.

Can only be fixed by adding a new healthbar object to the frame that is not bugged and keeping the default healthbar as value reference.

Actually it is WAY too close to Warlock color, that's why I reacted first, thinking my code was bugged, but it's not. I don't see the problem with the old color, the old one was gray... not sure how making it Warlock like helps at all lol...